Running out of memory

Would you mind posting your diagnostics from the settings?

I just tried to downgrade to v1.5.6 but that hasn’t helped.

Status: Verbunden
Redis Version: 5.0.8
Client: PhpRedis (v5.2.1)
Drop-in: Valid
Ping: 1
Redis Extension: 5.2.1
Predis Client: 1.1.1
PHP Version: 7.4.4
Multisite: Yes
Global Prefix: “”
Blog Prefix: 1
WP_REDIS_UNFLUSHABLE_GROUPS: [“site-transient”]
Global Groups: [
“blog-details”,
“blog-id-cache”,
“blog-lookup”,
“global-posts”,
“networks”,
“rss”,
“sites”,
“site-details”,
“site-lookup”,
“site-options”,
“site-transient”,
“users”,
“useremail”,
“userlogins”,
“usermeta”,
“user_meta”,
“userslugs”,
“blog_meta”
]
Ignored Groups: [
“counts”,
“plugins”,
“themes”
]
Unflushable Groups: [
“site-transient”
]
Dropins:
– advanced-cache.php v by
– Query Monitor Database Class v by
– Redis Object Cache Drop-In v1.5.6 by Till Krüss
Plugins:
– Affiliate Link Marker v0.3.0 by Johannes Kinast <johannes@travel-dealz.de> (Active network-wide)
– Antispam Bee v2.9.1 by pluginkollektiv (Active network-wide)
– Better Search Replace v1.3.3 by Delicious Brains (Inactive)
– Broken Link Checker v1.11.12 by WPMU DEV (Active)
– Colored Admin Post List v2.01 by Stevie (Active network-wide)
– Debug Bar v1.0 by wordpressdotorg (Active)
– Debug Bar ElasticPress v1.4 by 10up (Active)
– Debug Bar Rewrite Rules v0.6.3 by Oleg Butuzov (Inactive)
– de_DE v0.7.15 by Frank Bültge, Heiko Rabe (Inactive)
– Easy WP SMTP v1.3.9.2 by wpecommerce, alexanderfoxc (Active network-wide)
– ElasticPress v3.4.1 by 10up (Active network-wide)
– HTML Forms v1.3.15 by ibericode (Active network-wide)
– Individual Multisite Author v1.3.1 by Thomas Maier (Active network-wide)
– MultilingualPress v3.3.3 by Inpsyde GmbH (Active network-wide)
– Plugin Report v1.7 by Roy Tanck (Active network-wide)
– Post Category Filter v1.6.1 by Javier Villanueva (Active network-wide)
– Post Type Switcher v3.2.0 by John James Jacoby (Active network-wide)
– Pretty Links Developer Edition v3.1.0 by Blair Williams (Active)
– Public Post Preview v2.9.0 by Dominik Schilling (Active network-wide)
– PWA v0.4.0 by PWA Plugin Contributors (Active network-wide)
– Query Monitor v3.5.2 by John Blackbourn (Active network-wide)
– Redis Object Cache v1.5.6 by Till Krüss (Active network-wide)
– Regenerate Thumbnails v3.1.3 by Alex Mills (Viper007Bond) (Inactive)
– Review v1.2.0 by Johannes Kinast (Active network-wide)
– Safe SVG v1.9.8 by Daryll Doyle (Active network-wide)
– Seriously Simple Podcasting v1.20.13 by Castos (Inactive)
– ShortPixel Image Optimizer v4.17.2 by ShortPixel (Active network-wide)
– Show Parent Comment v0.2.1 by Stephen Cronin (Scratch99 Design) (Active network-wide)
– Simple Custom Post Order v2.4.9 by Colorlib (Active network-wide)
– Subscribe to Comments Reloaded v200205 by WPKube (Inactive)
– SVG Social Menu v2.0.0 by Florian Brinkmann (Inactive)
– Table of Contents Plus v2002 by Michael Tran (Active network-wide)
– Term Management Tools v1.1.4 by scribu (Active network-wide)
– Two Factor v0.5.1 by Plugin Contributors (Inactive)
– User Switching v1.5.4 by John Blackbourn & contributors (Active network-wide)
– Visual Term Description Editor v1.8.1 by Shea Bunge (Active network-wide)
– WordPress Sentry v3.4.6 by Alex Bouma (Active network-wide)
– WP-Matomo v1.0.22 by André Br?kling (Active)
– WP Crontrol v1.7.1 by John Blackbourn & crontributors (Inactive)
– WP Rocket v3.5.2 by WP Media (Active network-wide)
– WP Rocket CLI v1.0 by WP Rocket (Active network-wide)
– WP Rocket | Cache Feed v by WP Rocket Support Team (Active network-wide)
– WP User Avatars v1.4.0 by John James Jacoby (Active network-wide)
– Yoast SEO: News v12.4.1 by Team Yoast (Active network-wide)
– Yoast SEO Premium v13.4 by Team Yoast (Active network-wide)

You could try running a few days without making site-transient un-flushable and see if that causes it. Other than that, you could also just set a maxmemory-policy that way Redis will delete un-used keys when the memory is full.

Hi Till,

thank you for your suggestion. I added site-transient lately because I cache some API response and if I flush the cache too often, I get in trouble with the API limits. Anyway it seems that it doesn’t prevent the transients from flushing. After flushing the redis database is completely empty… I will change it to WP_REDIS_IGNORED_GROUPS

I set a maxmemory-policy. Hope that helps.

I watched redis with redis-cli monitor and saw a lot of keys like 2:terms:get_terms-9cdfae0fe36150df41a462e15fdc84c6-0.44170300 1586687153

The last part of the key seems to be a timestemp. Is this correct? Due to the timestemp I think this key will never hit again.

Johannes, can you post a full redis-cli monitor log?

You might have a 3rd party plugin using WP’s object cache the wrong way and filling it up with stale data. The safest way around that is to set a MaxTTL to 48 hours, or something.